A balisong or butterfly knife is uniquely designed so that when the knife is closed, the handles of the knife completely cover the blade. To open, you unlock the blade and use a wrist flipping motion to "unsheath" the blade.
These 5 inch (closed) Butterfly Knives have 440 stainless steel blades and cast metal handles. Very durable. All butterfly knives measure: Open 9" -- Closed 5.25" -- Blade 4.5".